apps/engine.c

   1 /*
   2  * Written by Richard Levitte <richard@levitte.org> for the OpenSSL project
   3  * 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <openssl/opensslconf.h>
  60 #ifdef OPENSSL_NO_ENGINE
  61 NON_EMPTY_TRANSLATION_UNIT
  62 #else
  63
  64 # include "apps.h"
  65 # include <stdio.h>
  66 # include <stdlib.h>
  67 # include <string.h>
  68 # include <openssl/err.h>
  69 # include <openssl/engine.h>
  70 # include <openssl/ssl.h>
  71
  72 typedef enum OPTION_choice {
  73     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  74     OPT_C, OPT_T, OPT_TT, OPT_PRE, OPT_POST,
  75     OPT_V = 100, OPT_VV, OPT_VVV, OPT_VVVV
  76 } OPTION_CHOICE;
  77
  78 OPTIONS engine_options[] = {
  79     {OPT_HELP_STR, 1, '-', "Usage: %s [options] engine...\n"},
  80     {OPT_HELP_STR, 1, '-',
  81         "  engine... Engines to load\n"},
  82     {"help", OPT_HELP, '-', "Display this summary"},
  83     {"v", OPT_V, '-', "List 'control commands' For each specified engine"},
  84     {"vv", OPT_VV, '-', "Also display each command's description"},
  85     {"vvv", OPT_VVV, '-', "Also add the input flags for each command"},
  86     {"vvvv", OPT_VVVV, '-', "Also show internal input flags"},
  87     {"c", OPT_C, '-', "List the capabilities of specified engine"},
  88     {"t", OPT_T, '-', "Check that specified engine is available"},
  89     {"tt", OPT_TT, '-', "Display error trace for unavailable engines"},
  90     {"pre", OPT_PRE, 's', "Run command against the ENGINE before loading it"},
  91     {"post", OPT_POST, 's', "Run command against the ENGINE after loading it"},
  92     {OPT_MORE_STR, OPT_EOF, 1,
  93      "Commands are like \"SO_PATH:/lib/libdriver.so\""},
  94     {NULL}
  95 };
  96
  97 static void identity(char *ptr)
  98 {
  99 }
 100
 101 static int append_buf(char **buf, int *size, const char *s)
 102 {
 103     if (*buf == NULL) {
 104         *size = 256;
 105         *buf = app_malloc(*size, "engine buffer");
 106         **buf = '\0';
 107     }
 108
 109     if (strlen(*buf) + strlen(s) >= (unsigned int)*size) {
 110         char *tmp;
 111         *size += 256;
 112         tmp = OPENSSL_realloc(*buf, *size);
 113         if (tmp == NULL) {
 114             OPENSSL_free(*buf);
 115             *buf = NULL;
 116             return 0;
 117         }
 118         *buf = tmp;
 119     }
 120
 121     if (**buf != '\0')
 122         OPENSSL_strlcat(*buf, ", ", *size);
 123     OPENSSL_strlcat(*buf, s, *size);
 124
 125     return 1;
 126 }
 127
 128 static int util_flags(BIO *out, unsigned int flags, const char *indent)
 129 {
 130     int started = 0, err = 0;
 131     /* Indent before displaying input flags */
 132     BIO_printf(out, "%s%s(input flags): ", indent, indent);
 133     if (flags == 0) {
 134         BIO_printf(out, "<no flags>\n");
 135         return 1;
 136     }
 137     /*
 138      * If the object is internal, mark it in a way that shows instead of
 139      * having it part of all the other flags, even if it really is.
 140      */
 141     if (flags & ENGINE_CMD_FLAG_INTERNAL) {
 142         BIO_printf(out, "[Internal] ");
 143     }
 144
 145     if (flags & ENGINE_CMD_FLAG_NUMERIC) {
 146         BIO_printf(out, "NUMERIC");
 147         started = 1;
 148     }
 149     /*
 150      * Now we check that no combinations of the mutually exclusive NUMERIC,
 151      * STRING, and NO_INPUT flags have been used. Future flags that can be
 152      * OR'd together with these would need to added after these to preserve
 153      * the testing logic.
 154      */
 155     if (flags & ENGINE_CMD_FLAG_STRING) {
 156         if (started) {
 157             BIO_printf(out, "|");
 158             err = 1;
 159         }
 160         BIO_printf(out, "STRING");
 161         started = 1;
 162     }
 163     if (flags & ENGINE_CMD_FLAG_NO_INPUT) {
 164         if (started) {
 165             BIO_printf(out, "|");
 166             err = 1;
 167         }
 168         BIO_printf(out, "NO_INPUT");
 169         started = 1;
 170     }
 171     /* Check for unknown flags */
 172     flags = flags & ~ENGINE_CMD_FLAG_NUMERIC &
 173         ~ENGINE_CMD_FLAG_STRING &
 174         ~ENGINE_CMD_FLAG_NO_INPUT & ~ENGINE_CMD_FLAG_INTERNAL;
 175     if (flags) {
 176         if (started)
 177             BIO_printf(out, "|");
 178         BIO_printf(out, "<0x%04X>", flags);
 179     }
 180     if (err)
 181         BIO_printf(out, "  <illegal flags!>");
 182     BIO_printf(out, "\n");
 183     return 1;
 184 }
 185
 186 static int util_verbose(ENGINE *e, int verbose, BIO *out, const char *indent)
 187 {
 188     static const int line_wrap = 78;
 189     int num;
 190     int ret = 0;
 191     char *name = NULL;
 192     char *desc = NULL;
 193     int flags;
 194     int xpos = 0;
 195     STACK_OF(OPENSSL_STRING) *cmds = NULL;
 196     if (!ENGINE_ctrl(e, ENGINE_CTRL_HAS_CTRL_FUNCTION, 0, NULL, NULL) ||
 197         ((num = ENGINE_ctrl(e, ENGINE_CTRL_GET_FIRST_CMD_TYPE,
 198                             0, NULL, NULL)) <= 0)) {
 199         return 1;
 200     }
 201
 202     cmds = sk_OPENSSL_STRING_new_null();
 203     if (!cmds)
 204         goto err;
 205
 206     do {
 207         int len;
 208         /* Get the command input flags */
 209         if ((flags = ENGINE_ctrl(e, ENGINE_CTRL_GET_CMD_FLAGS, num,
 210                                  NULL, NULL)) < 0)
 211             goto err;
 212         if (!(flags & ENGINE_CMD_FLAG_INTERNAL) || verbose >= 4) {
 213             /* Get the command name */
 214             if ((len = ENGINE_ctrl(e, ENGINE_CTRL_GET_NAME_LEN_FROM_CMD, num,
 215                                    NULL, NULL)) <= 0)
 216                 goto err;
 217             name = app_malloc(len + 1, "name buffer");
 218             if (ENGINE_ctrl(e, ENGINE_CTRL_GET_NAME_FROM_CMD, num, name,
 219                             NULL) <= 0)
 220                 goto err;
 221             /* Get the command description */
 222             if ((len = ENGINE_ctrl(e, ENGINE_CTRL_GET_DESC_LEN_FROM_CMD, num,
 223                                    NULL, NULL)) < 0)
 224                 goto err;
 225             if (len > 0) {
 226                 desc = app_malloc(len + 1, "description buffer");
 227                 if (ENGINE_ctrl(e, ENGINE_CTRL_GET_DESC_FROM_CMD, num, desc,
 228                                 NULL) <= 0)
 229                     goto err;
 230             }
 231             /* Now decide on the output */
 232             if (xpos == 0)
 233                 /* Do an indent */
 234                 xpos = BIO_puts(out, indent);
 235             else
 236                 /* Otherwise prepend a ", " */
 237                 xpos += BIO_printf(out, ", ");
 238             if (verbose == 1) {
 239                 /*
 240                  * We're just listing names, comma-delimited
 241                  */
 242                 if ((xpos > (int)strlen(indent)) &&
 243                     (xpos + (int)strlen(name) > line_wrap)) {
 244                     BIO_printf(out, "\n");
 245                     xpos = BIO_puts(out, indent);
 246                 }
 247                 xpos += BIO_printf(out, "%s", name);
 248             } else {
 249                 /* We're listing names plus descriptions */
 250                 BIO_printf(out, "%s: %s\n", name,
 251                            (desc == NULL) ? "<no description>" : desc);
 252                 /* ... and sometimes input flags */
 253                 if ((verbose >= 3) && !util_flags(out, flags, indent))
 254                     goto err;
 255                 xpos = 0;
 256             }
 257         }
 258         OPENSSL_free(name);
 259         name = NULL;
 260         OPENSSL_free(desc);
 261         desc = NULL;
 262         /* Move to the next command */
 263         num = ENGINE_ctrl(e, ENGINE_CTRL_GET_NEXT_CMD_TYPE, num, NULL, NULL);
 264     } while (num > 0);
 265     if (xpos > 0)
 266         BIO_printf(out, "\n");
 267     ret = 1;
 268  err:
 269     sk_OPENSSL_STRING_pop_free(cmds, identity);
 270     OPENSSL_free(name);
 271     OPENSSL_free(desc);
 272     return ret;
 273 }
 274
 275 static void util_do_cmds(ENGINE *e, STACK_OF(OPENSSL_STRING) *cmds,
 276                          BIO *out, const char *indent)
 277 {
 278     int loop, res, num = sk_OPENSSL_STRING_num(cmds);
 279
 280     if (num < 0) {
 281         BIO_printf(out, "[Error]: internal stack error\n");
 282         return;
 283     }
 284     for (loop = 0; loop < num; loop++) {
 285         char buf[256];
 286         const char *cmd, *arg;
 287         cmd = sk_OPENSSL_STRING_value(cmds, loop);
 288         res = 1;                /* assume success */
 289         /* Check if this command has no ":arg" */
 290         if ((arg = strstr(cmd, ":")) == NULL) {
 291             if (!ENGINE_ctrl_cmd_string(e, cmd, NULL, 0))
 292                 res = 0;
 293         } else {
 294             if ((int)(arg - cmd) > 254) {
 295                 BIO_printf(out, "[Error]: command name too long\n");
 296                 return;
 297             }
 298             memcpy(buf, cmd, (int)(arg - cmd));
 299             buf[arg - cmd] = '\0';
 300             arg++;              /* Move past the ":" */
 301             /* Call the command with the argument */
 302             if (!ENGINE_ctrl_cmd_string(e, buf, arg, 0))
 303                 res = 0;
 304         }
 305         if (res)
 306             BIO_printf(out, "[Success]: %s\n", cmd);
 307         else {
 308             BIO_printf(out, "[Failure]: %s\n", cmd);
 309             ERR_print_errors(out);
 310         }
 311     }
 312 }
 313
 314 int engine_main(int argc, char **argv)
 315 {
 316     int ret = 1, i;
 317     int verbose = 0, list_cap = 0, test_avail = 0, test_avail_noise = 0;
 318     ENGINE *e;
 319     STACK_OF(OPENSSL_STRING) *engines = sk_OPENSSL_STRING_new_null();
 320     STACK_OF(OPENSSL_STRING) *pre_cmds = sk_OPENSSL_STRING_new_null();
 321     STACK_OF(OPENSSL_STRING) *post_cmds = sk_OPENSSL_STRING_new_null();
 322     BIO *out;
 323     const char *indent = "     ";
 324     OPTION_CHOICE o;
 325     char *prog;
 326     char *argv1;
 327
 328     out = dup_bio_out(FORMAT_TEXT);
 329     if (engines == NULL || pre_cmds == NULL || post_cmds == NULL)
 330         goto end;
 331
 332     /* Remember the original command name, parse/skip any leading engine
 333      * names, and then setup to parse the rest of the line as flags. */
 334     prog = argv[0];
 335     while ((argv1 = argv[1]) != NULL && *argv1 != '-') {
 336         sk_OPENSSL_STRING_push(engines, argv1);
 337         argc--;
 338         argv++;
 339     }
 340     argv[0] = prog;
 341     opt_init(argc, argv, engine_options);
 342
 343     while ((o = opt_next()) != OPT_EOF) {
 344         switch (o) {
 345         case OPT_EOF:
 346         case OPT_ERR:
 347             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 348             goto end;
 349         case OPT_HELP:
 350             opt_help(engine_options);
 351             ret = 0;
 352             goto end;
 353         case OPT_VVVV:
 354         case OPT_VVV:
 355         case OPT_VV:
 356         case OPT_V:
 357             /* Convert to an integer from one to four. */
 358             i = (int)(o - OPT_V) + 1;
 359             if (verbose < i)
 360                 verbose = i;
 361             break;
 362         case OPT_C:
 363             list_cap = 1;
 364             break;
 365         case OPT_TT:
 366             test_avail_noise++;
 367         case OPT_T:
 368             test_avail++;
 369             break;
 370         case OPT_PRE:
 371             sk_OPENSSL_STRING_push(pre_cmds, opt_arg());
 372             break;
 373         case OPT_POST:
 374             sk_OPENSSL_STRING_push(post_cmds, opt_arg());
 375             break;
 376         }
 377     }
 378
 379     /* Allow any trailing parameters as engine names. */
 380     argc = opt_num_rest();
 381     argv = opt_rest();
 382     for ( ; *argv; argv++) {
 383         if (**argv == '-') {
 384             BIO_printf(bio_err, "%s: Cannot mix flags and engine names.\n",
 385                        prog);
 386             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 387             goto end;
 388         }
 389         sk_OPENSSL_STRING_push(engines, *argv);
 390     }
 391
 392     if (sk_OPENSSL_STRING_num(engines) == 0) {
 393         for (e = ENGINE_get_first(); e != NULL; e = ENGINE_get_next(e)) {
 394             sk_OPENSSL_STRING_push(engines, (char *)ENGINE_get_id(e));
 395         }
 396     }
 397
 398     for (i = 0; i < sk_OPENSSL_STRING_num(engines); i++) {
 399         const char *id = sk_OPENSSL_STRING_value(engines, i);
 400         if ((e = ENGINE_by_id(id)) != NULL) {
 401             const char *name = ENGINE_get_name(e);
 402             /*
 403              * Do "id" first, then "name". Easier to auto-parse.
 404              */
 405             BIO_printf(out, "(%s) %s\n", id, name);
 406             util_do_cmds(e, pre_cmds, out, indent);
 407             if (strcmp(ENGINE_get_id(e), id) != 0) {
 408                 BIO_printf(out, "Loaded: (%s) %s\n",
 409                            ENGINE_get_id(e), ENGINE_get_name(e));
 410             }
 411             if (list_cap) {
 412                 int cap_size = 256;
 413                 char *cap_buf = NULL;
 414                 int k, n;
 415                 const int *nids;
 416                 ENGINE_CIPHERS_PTR fn_c;
 417                 ENGINE_DIGESTS_PTR fn_d;
 418                 ENGINE_PKEY_METHS_PTR fn_pk;
 419
 420                 if (ENGINE_get_RSA(e) != NULL
 421                     && !append_buf(&cap_buf, &cap_size, "RSA"))
 422                     goto end;
 423                 if (ENGINE_get_DSA(e) != NULL
 424                     && !append_buf(&cap_buf, &cap_size, "DSA"))
 425                     goto end;
 426                 if (ENGINE_get_DH(e) != NULL
 427                     && !append_buf(&cap_buf, &cap_size, "DH"))
 428                     goto end;
 429                 if (ENGINE_get_RAND(e) != NULL
 430                     && !append_buf(&cap_buf, &cap_size, "RAND"))
 431                     goto end;
 432
 433                 fn_c = ENGINE_get_ciphers(e);
 434                 if (!fn_c)
 435                     goto skip_ciphers;
 436                 n = fn_c(e, NULL, &nids, 0);
 437                 for (k = 0; k < n; ++k)
 438                     if (!append_buf(&cap_buf, &cap_size, OBJ_nid2sn(nids[k])))
 439                         goto end;
 440
 441  skip_ciphers:
 442                 fn_d = ENGINE_get_digests(e);
 443                 if (!fn_d)
 444                     goto skip_digests;
 445                 n = fn_d(e, NULL, &nids, 0);
 446                 for (k = 0; k < n; ++k)
 447                     if (!append_buf(&cap_buf, &cap_size, OBJ_nid2sn(nids[k])))
 448                         goto end;
 449
 450  skip_digests:
 451                 fn_pk = ENGINE_get_pkey_meths(e);
 452                 if (!fn_pk)
 453                     goto skip_pmeths;
 454                 n = fn_pk(e, NULL, &nids, 0);
 455                 for (k = 0; k < n; ++k)
 456                     if (!append_buf(&cap_buf, &cap_size, OBJ_nid2sn(nids[k])))
 457                         goto end;
 458  skip_pmeths:
 459                 if (cap_buf && (*cap_buf != '\0'))
 460                     BIO_printf(out, " [%s]\n", cap_buf);
 461
 462                 OPENSSL_free(cap_buf);
 463             }
 464             if (test_avail) {
 465                 BIO_printf(out, "%s", indent);
 466                 if (ENGINE_init(e)) {
 467                     BIO_printf(out, "[ available ]\n");
 468                     util_do_cmds(e, post_cmds, out, indent);
 469                     ENGINE_finish(e);
 470                 } else {
 471                     BIO_printf(out, "[ unavailable ]\n");
 472                     if (test_avail_noise)
 473                         ERR_print_errors_fp(stdout);
 474                     ERR_clear_error();
 475                 }
 476             }
 477             if ((verbose > 0) && !util_verbose(e, verbose, out, indent))
 478                 goto end;
 479             ENGINE_free(e);
 480         } else
 481             ERR_print_errors(bio_err);
 482     }
 483
 484     ret = 0;
 485  end:
 486
 487     ERR_print_errors(bio_err);
 488     sk_OPENSSL_STRING_pop_free(engines, identity);
 489     sk_OPENSSL_STRING_pop_free(pre_cmds, identity);
 490     sk_OPENSSL_STRING_pop_free(post_cmds, identity);
 491     BIO_free_all(out);
 492     return (ret);
 493 }
 494 #endif